Jack, This is that RPC flaw in MicroSoft. I noticed it too.. Got about 20K in 15 hours Jim -----Original Message----- From: Jack Bates [mailto:jbates@brightok.net] Sent: Monday, August 11, 2003 4:12 PM To: NANOG Subject: RPC errors I'm showing signs of an RPC sweep across one of my networks that's killing some XP machines (only XP confirmed). How wide spread is this at this time. Also, does anyone know if this is just generating a DOS symptom or if I should be looking for backdoors in these client systems? -Jack